Hello, I am wondering if you have found a solution. My aqua logic is doing the same thing. It is an older system so no way to tell which relay is related to what polarity. We removed board and saw some burn marks on the K2 relay. We re soldered, worked for a couple of days and then back to 0amps, 0 salinity, 31V when on negative polarity. Positive polarity readings are all fine. Cell has only been used for 1 season (maybe 5 months). I remove it over the winter and replace with dummy cell.
Moved from here.
Moved from here.